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+--- Thread: gasket paper thickness (/showthread.php?tid=246)
gasket paper thickness - Dennis Nicholas - 16-09-2017
A question for the expert engineers.
Nobody seems to supply banjo gaskets for between the late, heavy 1938/9 axle, so am going to make one.
First hurdle = where can I get gasket paper.......lucky.....first phone call, to local very small factor..."yes I have two thicknesses - thick and thin, 13 inch X 13 inch sheets. Took metric micrometer with me and found:-
Thin = 3.5mm (0.013 inches - 13 thou)
Thick = 0.8mm (0.031 inches - 31 thou)
The make is anonymous.
Question....which thickness to use for banjo joint.....my thinking is the thick?
I will use the thin for the adjuster?
Ebay etc. would have involved a 1 week delay for delivery......already SEVERAL weeks delay on this axle alone waiting for bits!!!
Dennis
RE: gasket paper thickness - Tony Betts - 16-09-2017
hi denis,
as a supplier,
from memory gaskets for the austin 7 are usually 17 thou thin or 27 thou thick.
the banjos on the austin 7 are the thicker 27 thou.
so use the thick opsion offered.
tony
RE: gasket paper thickness - Speedex750 - 16-09-2017
Hi Dennis,
It probably doesn't make any difference as the adjusters will take up any dimensional changes - as Tony suggests, if you've got a choice go for the thicker.
Other than head and the long manifold gaskets I make all my own. Christmas wrapping paper comes rolled up on a sheet of superb brown paper that makes great gaskets. It's very satisfying rubbing your slightly oily finger over the gasket paper to give an outline; punch out the holes with a wad punch first, then cut the internal holes with a curved pair of nail scissors and finally go round the outside of the gasket.
I've got the late big axle as well, I can't remember if the bolts are in blind holes or if you've got to seal them as well to keep the oil in?
Sounds like you're making progress with your axle, I hope it goes well.
Dave
RE: gasket paper thickness - Ruairidh Dunford - 16-09-2017
Hello Dennis,
if it helps you to know, and saves you time - I have not used paper gaskets in back axles for many years now.
I currently use: Loctite 518 flange sealant, fabulous stuff.
RE: gasket paper thickness - Tony Betts - 16-09-2017
(16-09-2017, 06:06 PM)Ruairidh Dunford Wrote: Hello Dennis,
if it helps you to know, and saves you time - I have not used paper gaskets in back axles for many years now.
I currently use: Loctite 518 flange sealant, fabulous stuff.
Do remember, no paper gaskets should be fitted dry anyway.
The use of locatite could save you making a gasket. Well done R.
Bit more traditional myself, I use paper gaskets with a gasket sealant.
Tony.
RE: gasket paper thickness - Ruairidh Dunford - 16-09-2017
I used to do this as well Tony - until it was pointed out to me that it increased the number faces and therefore the possibility to leak.
I understand the desire to use paper gaskets despite not doing so myself.
RE: gasket paper thickness - Ian Williams - 16-09-2017
Just endorsing Ruairidh's comment, I also use Loctite 518 alone on back axle banjos.....and many other joints!